“Why just play with physics engines when you can write your own… assuming you don’t fear math too much.”
I don’t know if you’ve ever touched a physics engine, but they all require the same level of math as writing your own would. Besides that, writing extensive physics engines such as Havok will also require you to do SIMD optimizations manually.
“I just hope that widespread use of GPU’s encourages laptop hardware manufacturers to put real GPU’s in, instead of using the Intel’s main memory sharing rubbish chips that can’t compute their way out of a wet paper bag.”
There is hardly a problem with sharing memory; the real problem with the Intel chips is OpenGl support - or lack thereof.